feat: add release automation workflow

[IanMayo]

Summary

• Add tag-triggered release workflow (.github/workflows/release.yml)
• Add release documentation (docs/RELEASE.md)
• Update README with release process section

How It Works

1. Push a vX.Y.Z tag to main branch
2. Workflow runs CI checks (lint, test, build)
3. Creates GitHub Release with auto-generated notes
4. Attaches bundle artifacts (sonar-quiz.iife.js + source map)
5. Updates package.json to match tag version

Test Plan

• Verify workflow YAML syntax is valid
• After merge, test by pushing v0.2.0 tag
• Verify GitHub Release is created with artifacts
• Verify package.json version is updated

Closes #88

[github-actions]

🚀 PR Preview Deployment

✅ Your changes are being built and deployed to a preview environment.

📋 Live PR Preview Links:

• 🌐 DITA WebHelp Preview
• 📚 Storybook Preview

ℹ️ About PR Previews:

• Preview deploys automatically when you push commits to this PR
• Preview URL is unique to this PR (feat: add release automation workflow #89)
• Preview will be automatically deleted when this PR is closed/merged
• Build ignores test failures (only requires successful compilation)

📦 Production Demo (main branch):

• 🏠 Quiz Index (Home)
• 📝 Quiz Examples
• 📊 Analysis Examples

🧪 Testing Locally:

npm install
npm run build
# Open demo/quiz-index.html in your browser (use file:// or http-server)

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